[INFO] fetching crate parse-regex 0.0.1...
[INFO] testing parse-regex-0.0.1 against 1.75.0 for beta-1.76-1
[INFO] extracting crate parse-regex 0.0.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate parse-regex 0.0.1 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate parse-regex 0.0.1
[INFO] finished tweaking crates.io crate parse-regex 0.0.1
[INFO] tweaked toml for crates.io crate parse-regex 0.0.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4cf8801e8e067f7ce1095538b20d0f54fb1789241df2fa0c84c6b7bce1e3c3f0
[INFO] running `Command { std: "docker" "start" "-a" "4cf8801e8e067f7ce1095538b20d0f54fb1789241df2fa0c84c6b7bce1e3c3f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4cf8801e8e067f7ce1095538b20d0f54fb1789241df2fa0c84c6b7bce1e3c3f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4cf8801e8e067f7ce1095538b20d0f54fb1789241df2fa0c84c6b7bce1e3c3f0", kill_on_drop: false }`
[INFO] [stdout] 4cf8801e8e067f7ce1095538b20d0f54fb1789241df2fa0c84c6b7bce1e3c3f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 36d70a259bfb21615a3aa8e74ea38bb7f344b8521f93c843190cdc4509ab8ad6
[INFO] running `Command { std: "docker" "start" "-a" "36d70a259bfb21615a3aa8e74ea38bb7f344b8521f93c843190cdc4509ab8ad6", kill_on_drop: false }`
[INFO] [stderr]    Compiling parse-regex v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:26:18
[INFO] [stdout]    |
[INFO] [stdout] 26 |         let t1 = try!(self.term());
[INFO] [stdout]    |                  ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:29:22
[INFO] [stdout]    |
[INFO] [stdout] 29 |             let t2 = try!(self.term());
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:39:21
[INFO] [stdout]    |
[INFO] [stdout] 39 |             let f = try!(self.factor());
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:46:17
[INFO] [stdout]    |
[INFO] [stdout] 46 |         let b = try!(self.base());
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:58:21
[INFO] [stdout]    |
[INFO] [stdout] 58 |             let r = try!(self.regex());
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(collections)]
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `collections`
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(collections)]
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for struct `String` in the current scope
[INFO] [stdout]   --> src/parser.rs:68:16
[INFO] [stdout]    |
[INFO] [stdout] 68 |         self.s.char_at(self.pos)
[INFO] [stdout]    |                ^^^^^^^ help: there is a method with a similar name: `chars`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors; 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `parse-regex` (lib) due to 4 previous errors; 5 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "36d70a259bfb21615a3aa8e74ea38bb7f344b8521f93c843190cdc4509ab8ad6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36d70a259bfb21615a3aa8e74ea38bb7f344b8521f93c843190cdc4509ab8ad6", kill_on_drop: false }`
[INFO] [stdout] 36d70a259bfb21615a3aa8e74ea38bb7f344b8521f93c843190cdc4509ab8ad6
[INFO] testing parse-regex-0.0.1 against beta-2023-12-22 for beta-1.76-1
[INFO] extracting crate parse-regex 0.0.1 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate parse-regex 0.0.1 on toolchain beta-2023-12-22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate parse-regex 0.0.1
[INFO] finished tweaking crates.io crate parse-regex 0.0.1
[INFO] tweaked toml for crates.io crate parse-regex 0.0.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1d52b801f0fb70f0d4bf8595fe2492aeebc5b0946c51659d902d999b112b4417
[INFO] running `Command { std: "docker" "start" "-a" "1d52b801f0fb70f0d4bf8595fe2492aeebc5b0946c51659d902d999b112b4417", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d52b801f0fb70f0d4bf8595fe2492aeebc5b0946c51659d902d999b112b4417", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d52b801f0fb70f0d4bf8595fe2492aeebc5b0946c51659d902d999b112b4417", kill_on_drop: false }`
[INFO] [stdout] 1d52b801f0fb70f0d4bf8595fe2492aeebc5b0946c51659d902d999b112b4417
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9119b083273d6a736f4f633194489e8075c5d56033650bc2dcc4cbe242f1c1f4
[INFO] running `Command { std: "docker" "start" "-a" "9119b083273d6a736f4f633194489e8075c5d56033650bc2dcc4cbe242f1c1f4", kill_on_drop: false }`
[INFO] [stderr]    Compiling parse-regex v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:26:18
[INFO] [stdout]    |
[INFO] [stdout] 26 |         let t1 = try!(self.term());
[INFO] [stdout]    |                  ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:29:22
[INFO] [stdout]    |
[INFO] [stdout] 29 |             let t2 = try!(self.term());
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:39:21
[INFO] [stdout]    |
[INFO] [stdout] 39 |             let f = try!(self.factor());
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:46:17
[INFO] [stdout]    |
[INFO] [stdout] 46 |         let b = try!(self.base());
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parser.rs:58:21
[INFO] [stdout]    |
[INFO] [stdout] 58 |             let r = try!(self.regex());
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(collections)]
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `collections`
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(collections)]
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for struct `String` in the current scope
[INFO] [stdout]   --> src/parser.rs:68:16
[INFO] [stdout]    |
[INFO] [stdout] 68 |         self.s.char_at(self.pos)
[INFO] [stdout]    |                ^^^^^^^ help: there is a method with a similar name: `chars`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors; 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `parse-regex` (lib) due to 4 previous errors; 5 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "9119b083273d6a736f4f633194489e8075c5d56033650bc2dcc4cbe242f1c1f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9119b083273d6a736f4f633194489e8075c5d56033650bc2dcc4cbe242f1c1f4", kill_on_drop: false }`
[INFO] [stdout] 9119b083273d6a736f4f633194489e8075c5d56033650bc2dcc4cbe242f1c1f4
